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	<meta charset="UTF-8">
	<meta name="viewport" content="width=device-width, initial-scale=1.0">
	<meta http-equiv="X-UA-Compatible" content="ie=edge">
	<title>过渡</title>
	<link rel="stylesheet" href="css1/Ch3-1.css">
    
</head>
<body>
	
	<div class="box"></div>
	<a href="https://www.baidu.com" target="_red" >baidu</a>
	<a href="https://www.YouTube" target="_green" >YouTube</a>
	<ul class="menu">
		<li><a href="https://www.runoob.com/css/css-pseudo-classes.html"target="_black" >CSS教程</a></li>
		<li>CSS简介</li>
		<li>CSS语法</li>
		<li>CSS Id 和 Class选择器</li>
		<li>CSS创建</li>
	</ul>
</body>
</html>